Improvement in purifying feed-water for boilers



UNITED-STATES PATENT OFFICE.

EDVARD BOHLIG, OF EISEXAGH, GERMANY.

IMPROVEMEN'l'lN PURIFYING. FEED-WATER FOR BOILERS.

Specification forming part. of Lmmrumm No. 206,161, daied'Jnl '23, 197R; application filed April 6,1877.

To all whom it may co-awewi purities in the water, produce generally the Be it .known that':I, EDWARD BOHLIG,,Of contrary result from the one desired. Eisen-ach, Germany, have invented a new'and In carrying out my invention I'eolleot any useful Process .for Purifying Feed-Water fer! required quantity of water in a suitable tank Steam-Boilers,which process is fully setforth- [provided with a steam-coil for heating the'wain the following specification. ter," and mix a quantity of oxide of magnesium This invention relates to that class of prowith this water, which, after being heated to cesses employed for removing or neutralizing about 180 and then allowed to settle for a a-ll'impurities in water used for feeding steam-, short time-say, about one-quarterof an hourboilers, through which the incrusta'tion in the will then be ready to be drawn ofi for use to same is usually produced; audit consists in feed the boilers, all impurities detrimental to mixing oxide of magnesium (Mg0)'with the the iron, and generally causing the incrustawater to be used and then heating the same. 'tion in the steam-boiler, having settled in the The advantagesoi' the use of oxide of magbottom of the tank.

nesium consist in the fact that the same, com- WVhat I claim as my invention, and desire Dining with the particles of limestone and bito secure by Letters Patent, is-

carbonates generally contained inthe water The process of purifying water to be used in deprives the same of part of their carbonic. steam-boilers, which consists in mixing oxide acid, whereby these ingredients become insolof magnesium therewith in a separate tank or uble, and are, together with the oxide of magvessel, then heating the water, as described, nesium, precipitated to the bottom to allow and allowing it to settle before feeding it to the purifiedwate I to be drawn off. The oxide the steam-boiler, substantially as and for the of magnesium being insoluble in watler, any purpose herein specified.

excess thereof wi not act detrimental y, as is" 1 the case with other agents hitherto employed 1 for this purpose, wherethe least excess in proportion to the quantity of water operated upon, or in proportion to the exact quanti-y of im- Witnesses:

FRANZ Wmrn, FRANZ IIAssLAcnr 

